SELECT 
  * 
FROM 
  vi_product_feature_variants 
WHERE 
  variant_id IN (
    86, 133, 87, 134, 1199, 1200, 1201, 1193, 
    1194, 1195
  )

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "vi_product_feature_variants",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["variant_id"],
          "rows": 10,
          "filtered": 100,
          "index_condition": "vi_product_feature_variants.variant_id in (86,133,87,134,1199,1200,1201,1193,1194,1195)"
        }
      }
    ]
  }
}